If you are looking for what number it is, it can be described by this equation: 2x-12=6. Solving this equation x=9.
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twice a number means a number times 2
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
Twice the number n is 2n.
Twice a number minus two giving us the answer as eight is number 5.
If the number is n, then twice the number is 2n and the sum of the two is n + 2n = 3n.